28．He spent much of the evening with Robert Green,____he had hardly seen in the thirty years since they had worked together at CBS

Some children prefer to eat junk food ________ it’s not good for their health.

In our class, 85% of the students take the bus to school. So _______ students in our class get to school by bus.

Inordertokeepfit,youwilltakeexercise_________andeathealthily [ ]

The president hopes that the people will be better off when he quits than when he_______[ ]